<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="tittle border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="tittle border-topbottom">热门城市</div>
                <div class="button-list">
                    <div
                            class="button-wrapper"
                            v-for="item of hot"
                            :key="item.id"
                            @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div
                    class="area"
                    v-for="(item, key) of cities"
                    :key="key"
                    :ref="key"
            >
                <div class="tittle border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div
                            class="item border-bottom"
                            v-for="innerItem of item"
                           :key="innerItem.id"
                            @click="handleCityClick(innerItem.name)"
                    >
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
    import Bscroll from 'better-scroll'
    import { mapState,mapMutations } from 'vuex'
    export default {
        name: "CityList",
        props: {
            hot: Array,
            cities: Object,
            letter: String
        },
        computed: {
            ...mapState({
                currentCity: 'city'
            })
        },
        methods: {
            handleCityClick (city) {
                this.changeCity(city)
                this.$router.push('/')
            },
            ...mapMutations(['changeCity'])
        },
        watch: {
            letter () {
                if (this.letter) {
                    const element = this.$refs[this.letter][0]
                    this.scroll.scrollToElement(element)
                }
            }
        },
        mounted() {
            this.scroll = new Bscroll(this.$refs.wrapper,{
                click: true
            })
        }
    }
</script>

<style lang="stylus" scoped>
    @import "~styles/varibles.styl"
    .border-topbottom
        &:before
            border-color #ccc
        &:after
            border-color #ccc
    .border-bottom
        &:before
            border-color #ccc
    .list
        overflow hidden
        position absolute
        top 1.58rem
        left 0
        right 0
        bottom 0
        .tittle
            line-height .54rem
            background #eee
            padding-left .2rem
            color #666
            font-size .26rem
        .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrapper
                float left
                width 33.33%
                .button
                    margin .1rem
                    padding .1rem 0
                    text-align center
                    border .02rem solid #ccc
                    border-radius .06rem
        .item-list
            .item
                line-height .76rem
                padding-left .2rem
</style>
